The Big Three's New Diesels put on a Dyno

[jerem0621]

Here is the TFL video

The results are...



Thanks!

Jeremiah

[Rich1961]

Wild Card wrote:

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

Again... Horse Power is a calculation.

Torque in ft# X RPM /5252, thats it...this is the only way to calculate Horsepower

I also dont buy those numbers above. The V8 diesels red line almost 1k RPM above the I6. Do the math yourself.

The V8 Diesels redlining almost 1k rpm higher simply isn't true. Besides the truck in my signature which shifts at 3000 rpms under full throttle, I drive a 2011 F350 with the PSD and it shifts at 2900 rpms at full throttle. The Cummins is right at those rpms also at full throttle. The V8 diesels will rev higher than the Cummins under exhaust brake usage which is the only area where they rev higher.

Rich

[RCMAN46]

ShinerBock wrote:
Dynos measure torque and calculate horsepower based on the torque reading at a certain rpm.

Super Chevy wrote:
"What dynos actually measure is torque, not horsepower," explains Roberts. "Since horsepower is a mathematical equation, the dyno measures torque then calculates horsepower."

Learn About Dyno Testing - How Dynos Work

This is a quote from Wikipedia on how an inertia dyno works.

Inertia Sweep: an inertia dyno system provides a fixed inertial mass flywheel and computes the power required to accelerate the flywheel (the load) from the starting to the ending RPM. The actual rotational mass of the engine (or engine and vehicle in the case of a chassis dyno) is not known, and the variability of even the mass of the tires will skew the power results. The inertia value of the flywheel is "fixed", so low-power engines are under load for a much longer time and internal engine temperatures are usually too high by the end of the test, skewing optimal "dyno" tuning settings away from the optimal tuning settings of the outside world. Conversely, high powered engines commonly complete a "4th gear sweep" test in less than 10 seconds, which is not a reliable load condition,citation needed, as compared to operation in the real world. By not providing enough time under load, internal combustion chamber temperatures are unrealistically low and power readings - especially past the power peak - are skewed to the low side.

[Redwoodcamper]

Plus ATS has no reason fake dyno readings. They sell parts for all three. Every truck is gonna make slightly different power levels. It is funny how the oldest, most reliable and easiest to work on engine makes more torque than the much more complicated, "all new" engines.
My local phone and power companies all switched from Ford to ram in the last few years. Better value.

[Flashman]

jerem0621 wrote:

goducks10 wrote:
Fake news.

it's not fake news.

These TFL guys are a little corney but they do a much better job than some of the automotive journalist and get much closer to real world use with the limited time they have these trucks.

* Hitch up a trailer and drive it up a mountain.... see how long it takes...how does the truck handle

* Hitch up a trailer and drive 100 miles and check the MPG

* How much actual power do these things make? IDK, let's hook it up to a Dyno and see

I enjoy these videos much better than anything motor trend and the like produce. Heck, while everyone was fawning over the Ridgeline it was TFL Truck that proved that you can overheat the transmission in a Ridgeline just taking it moderately off road on a real trail. Nobody else reported that sort of thing.

Geeze you could give some folks a pot of gold and they would complain about the size of the pot.

Thanks!

Jeremiah

Well said

The complainers are probably from the fan club of the brand that did not do too well.

[ShinerBock]

Dynos measure torque and calculate horsepower based on the torque reading at a certain rpm.

Super Chevy wrote:
"What dynos actually measure is torque, not horsepower," explains Roberts. "Since horsepower is a mathematical equation, the dyno measures torque then calculates horsepower."

Learn About Dyno Testing - How Dynos Work

[jerem0621]

goducks10 wrote:
Fake news.

it's not fake news.

These TFL guys are a little corney but they do a much better job than some of the automotive journalist and get much closer to real world use with the limited time they have these trucks.

* Hitch up a trailer and drive it up a mountain.... see how long it takes...how does the truck handle

* Hitch up a trailer and drive 100 miles and check the MPG

* How much actual power do these things make? IDK, let's hook it up to a Dyno and see

I enjoy these videos much better than anything motor trend and the like produce. Heck, while everyone was fawning over the Ridgeline it was TFL Truck that proved that you can overheat the transmission in a Ridgeline just taking it moderately off road on a real trail. Nobody else reported that sort of thing.

Geeze you could give some folks a pot of gold and they would complain about the size of the pot.

Thanks!

Jeremiah

[goducks10]

Fake news.

[RCMAN46]

Wild Card wrote:

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

Again... Horse Power is a calculation.

Torque in ft# X RPM /5252, thats it...this is the only way to calculate Horsepower

I also dont buy those numbers above. The V8 diesels red line almost 1k RPM above the I6. Do the math yourself.

Buy the numbers or not but they are the numbers published by the respective truck manufacturers.

Take The time to look them up at the respective truck websites.

Despite popular belief the chassis dynamometer measures horsepower directly and then the computer calculates the torque curve.

Look up how a chassis dynamometer works.

[Wild_Card]

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

Again... Horse Power is a calculation.

Torque in ft# X RPM /5252, thats it...this is the only way to calculate Horsepower

I also dont buy those numbers above. The V8 diesels red line almost 1k RPM above the I6. Do the math yourself.

[Wild_Card]

4x4ord wrote:

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

The number of cylinders has absolutely nothing to do with torque.

That is not what I said, now is it?

[Wild_Card]

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

[4x4ord]

Cummins12V98 wrote:
Percentage of advertised HP and TQ loss.

RAM
HP loss 12 percent
TQ loss 8

Ford
HP loss 12
TQ loss 13

GM
HP Loss 24
TQ loss 15

This doesn't make sense. Another way of stating this should be to say, at 2800 rpm both the Ram and Ford made 88% of the manufacturer's rated torque at 2800 rpm.

Yet for some reason at lower rpm the manufacturers apparently over rate the Ford and under rate the Ram. Or the dyno by.bers are off. My guess is the dyno numbers are off.

[4x4ord]

RCMAN46 wrote:

Wild Card wrote:
No brainer that the inline engine produces more torque. Hp is derived by the RPM the engines can spin to...again no brainer that the V engines spin faster thus produce more HP.

Lets take a look at the spes.

Ram 6.7 385 hp @ 2800 rpm
900 ft/lbs @ 1700 rpm

Ford 6.7 440 hp @ 2800 rpm
925 ft/lbs @ 1800 rpm

Duramax 445 hp @2800 rpm
910 ft/lbs @1600 rpm.

The number of cylinders has absolutely nothing to do with torque.

[goducks10]

I want a red one. I don't care which brand.

[htwheelz67]

who cares about the dyno, hook the same trailer to each, race them uphill, downhill, see who stops fastest and then measure fuel economy. They are all great at what they do bottom line is bang for the buck and reliabilty. A new diesel will run 60-75k to buy. Frankly you can bulletproof an older 6.0 for much cheaper, you can find an 06-07 duramax, an older 5.9 cummins that you can tune and not deal with DPF and DEF. I went from diesel to a 3v v10 yeah mielage sucks but it tows good and its cheap to maintain, I can replace my engine 3 times vs 1 6.7 diesel.